Thread-parting mechanism for looms.



E. A. 6L1. V. CUNNiFF.

THREAD PARTING MECHANISM FOR LOOMS.

APPLICATION FILED DECJZ, 1912.

1 258,656. Pawnted Mar. 12, 1918.

22 4 J b I nve niore Edwa rd fl. John a: flan WW UNTTED STATES PATENT OFFICE.

EDWARD A. CUNNIFF, OF NEW BEDFORD, AND JOHN V. CUNNIFF, 0F FALL RIVER, MASSACHUSETTS, ASSIGNORS TO JAMES K. LANNING, OF BOSTON, MASSACHUSETTS.

THREAD-PARTING MECHANISM FOR LOOMS.

Application filed December 12, 1912.

To all whom it may concern:

Be it known that we, EDWARD A. GUNNIFF and JOHN V. CUNNIFF, citizens of the United States, and residents, respectively, of New Bedford and Fall River, in the county of Bristol and State of Massachusetts, have invented an Improvement in Thread-Parting Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to thread parting mechanism for looms, and particularly to thread parting mechanism for replenishing looms.

In order that the principle of the invention may be readily understood, a single embodiment thereof is disclosed in the accompanying drawing, wherein- Figure 1 is an end elevation of a loom having the invention applied thereto;

Fig. 2 is a plan view of that portion of the loom at which the thread parter is applied; and

Fig. 3 is a detail, partially in section, upon an enlarged scale, representing the thread parter in active and inactive positions.

The thread parter herein represented is particularly intended for parting the thread of an ejected bobbin or carrier, such, for example, as a shuttle or a bobbin or other weft carrier therefor, and also for cutting the weft of the replenishing shuttle or weft carrier between the selvage and that portion of the loom to which usually the free end of the weft of the replenishing weft carrier is attached.

In the accompanying drawing, there are illustrated merely the thread parter and the operating means therefor and parts immediately co-acting therewith. It is to be understood that said thread parter may be employed in conjunction with and that it is particularly adapted for use in conjunction with a shuttle replenishing mechanism, such as shown in the application of ourselves filed December 12, 1912, Serial No. 736,284.

Referring more particularly to the drawing, the frame of the loom is indicated at 1, the lay at 2, the shuttle race of the lay at 3, the shuttle box thereof at 4, the crank shaft at 5, the operating connection between Specification of Letters Patent.

Patented Mar. 12, 1918.

Serial No. 736,286.

the crank shaft and the lay at 6, the weft cam shaft at 7 and the breast beam of the loom at 8. These parts may be and preferably are of usual construction. Upon the breast beam of the loom, and preferably at that side of the loom where the shuttle or weft carrier is ejected upon substantial exhaustion of the filling or upon failure thereof, and where the new shuttle or weft earrier is inserted, there is mounted a thread parter 9. Preferably this thread parter is a blade 10 terminating in an upwardly directed hook 11 having a sharpened, weft severing inner edge. This thread parter is preferably provided with an angular slot 12 wherein is received a pin 13 laterally projecting from the supporting arm 14; of the loom temple 15 which is here shown as mounted upon the upper surface of the breast beam for transverse adjustment with respect thereto, as by means of a slot 16 and screws 17.

The loom temple 15 is provided with a, sheath or guiding bracket or projection 18 having a depending guiding member 18, the said thread parter 9 being positioned for movement between the main portion of the bracket 18 and the guiding member 18', so as to be projected forward therefrom as indicated in full lines in Fig. 1, or to be retracted into substantially the position indicated in full lines in Fig. 3.

\Vhile the thread parter may be operated in any suitable manner, it is preferably op erated from the weft or half time cam shaft 7, and the timing is such that the thread parter is projected into thread parting position only after the shuttle has been thrown from that side of the loom at which the said thread parter is mounted. The thread parter is projected only upon alternate beats of the lay, as it is actuated from the said weft cam half time shaft, and therefore at those times when the shuttle is in the box at that side of the lay where the parter is mounted, the said parter is in its retracted position.

During the normal operation of the loom therefore, the thread parter is projected at each alternate beat of the lay when the lay is on its backward beat. At such times the weft thread does not extend beyond the selvage at that side of the loom where the thread parter is mounted, and when the weft thread is present at such side of the loom then the thread parter is in its retracted or inactive position and cannot act upon the thread.

In order to actuate the thread part-er as described, there is herein representedas fast upon the weft cam shaft 7 a cam. 19 adapted I with a vertical lever 24 pivoted at 25 upon abracket 25 secured to the breast beam of the loom, said lever being pivoted at its upper end at 26 to the thread parter 9 as represented in Figs. 1 and Assuming that the thread parter is intended for use in connection with a loom provided with means for supplying a replenishing shuttle upon substantial or predetermined exhaustion of the filling, it will be understood that preferably the weft thread of the shuttle that is to be supplied to the loom is connected at its free end to some bracket or portion of the loom frame. lWhen the shuttle from which the filling has been substantially exhausted is ejected from the loom, then its thread extends from the selvage of the shuttle toward or to the shuttle box 4: at that side of the loom where the thread parter is mounted. Therefore when next the thread parter is projected, it encounters a thread extending beyond the selvage, and said thread (represented in dotted lines at 27 in Fig. 2) is'received in the hook Hand is drawn forward and severed. Upon the next projecting movement of the thread parter, it encounters the thread of the new shuttle or of the filling which extends from the selvage to the described point of attachn'ient thereof, and in a similar manner severs the same. When the thread is severed, the shuttle is boxed at the opposite side.

In order to prevent the filling thread of the ejected shuttle and of the replenishing shuttle from extending below the path of operation of the thread parter, there is preferably provided a bracket or support 28 at the front of the lay adjacent the thread parter and projecting toward the same. This bracket is represented as notched or shouldered at 2-9 to engage the thread. The thread is, received thereon and as the lay moves forward the said thread is transferred to the hook 11 of the thread parter 9 which has been projected during the preceding backward beat of the lay and is now returning or being retracted during the forward beat of the lay. In order to insure the thread being-deposited in the hook 11, there is preferably imparted a combined forward and downward projecting movement to the threadparter as represented in Fig. 3, this movement being due to the shape of the slot 12. Upon its return movement the thread parter moves upwardly and backwardly. It will be understood thatthe thread parter is projected or moved outwardly during alternate beats of the lay, upon the backward beat thereof, and that as the lay beats up upon its next forward beat, the thread parter is retracted before the lay can come in contact with said parter.

Having thus described one illustrative embodiment of the invention, it is to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims:

1. Thread parting mechanism for looms comprising in combination a shuttles-upper-ting lay, a coiipe ating hooked parter for the thread of said shuttle, the cam shaft and connections from said cam shaft to said parter to project and retract the same toward. and from the lay, thereby to sever the thread.

2. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay, a cooperating parter for the thread of said shuttle, and means to actuate the parter on alternate beats only of the lay and to project and retract the parter to and from the lay.

3. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay, a thread parter and means to project said parter toward the lay after the throw of the shuttle from that side of the loom at which the parter is placed, thereby to part at said side of the loom, the thread laid by the shuttle on said throw.

at. Thread parting mechanism for looms comprising in combination, a shuttlesupporting lay, a 'tl1 read parter positioned closely adjacent theselvage, and means tov pro ect saidthread parter toward the lay only after the throw of the shuttle from that side of the loom where the said parter 6. Thread parting mechanism. for looms comprising in combination, av shuttle-sup porting .ay, a thread parter, and operating means for said thread parter including means to maintain said parter in retracted position'when the shuttle is at the thread parter side-of the loom and to project said parter only 1 after .the shuttle has been thrown'from said side of the loom.

7. Thread part ng mechamsm for looms comprising in combination a shuttle-supporting lay, a thread parter and means to impart a combined forward and downwardprojecting movement to said parter toward the lay.

8. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay, a thread parter mounted upon the breast beam, and means to impart a combined forward and downward projecting movement, and a combined upward and backward retracting movement thereto toward and from the lay.

9. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay, a thread parter and operating means for said parter including means independent of the lay to project the said parter on the backward beat of the lay, to hold it projected until the next forward beat of the lay and to retract it during the latter part of such forward beat.

10. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay, a thread parter, the weft cam shaft having a thread parter operating cam thereon, and operating connections between said thread parter and cam to project said parter on the backward beat of the lay, to hold it projected until the next forward beat of the lay and to retract it during the latter part of such forward beat.

11. Thread parting mechanism for looms comprising, in combination, a shuttle supporting lay, a thread parter extraneous to the lay and consisting of a blade having a hook, a sheath for said blade, and means also extraneous to the lay to move said thread parter to engage the thread and to sever it.

12. Thread parting mechanism for looms con'iprising in combination a shuttle-supporting lay, a thread parter consisting of a blade having a hook, a sheath for said blade, and operating means for said parter including positively acting means to project said hook and blade during the backward beat of the lay and to effect retraction thereof during the latter part of the next forward beat of the lay.

13. Thread parting mechanism for looms comprising in combination a shuttle-supporting lay having a thread receiving and transferring bracket projecting from the front thereof, a thread parter at the same side of the loom as said bracket, and operating means for said thread parter including means to project the parter toward the lay to receive the thread from said bracket.

i-tt. lhread parting mechanism for looms comprising in combination, a shuttle-supporting lay having a thread receiving and transferring bracket projecting from the front thereof, a thread parter at the same side of the loom as said bracket, and operating means for said thread parter including means to project the parter to receive the thread from said bracket and to retract said parter upon the forward beat of the lay, thereby to part the thread.

15. Thread parting mechanism for looms comprising in combination, a shuttle supporting lay, a cooperating hooked parter for the thread of said shuttle, the cam shaft, and connections from said cam shaft to said parter to project and retract the same toward and from the lay, thereby to sever the thread.

16. Thread parting mechanism for looms comprising in combination, a shuttle supporting lay, a hook-like thread parter, and means to project said parter toward the lay after the throw of the shuttle from that side of the loom at which the parter is placed, thereby to part at said side of the loom the thread laid by the shuttle on said throw.

17. Thread parting mechanism for looms comprising in combination, a shuttle supporting lay, a hooked thread parter, and means to impart a combined forward and downward projecting movement to said parter toward the lay.

18. Thread parting mechanism for looms comprising in combination, a shuttle supporting lay, a thread parter and operating means for said parter including positively actuated means to project said parter 0n the backward beat of the lay, to hold it projected until the next forward beat of the lay and to retract it during the latter part of such forward beat.

19. Thread parting mechanism for looms comprising in combination, a shuttle supporting lay, a thread parter, and operating means for said parter including means to project said parter forwardly and downwardly on the backward beat of the lay, to hold it projected until the next forward beat of the lay and to retract it during the latter part of such forward beat.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

EDlVARD A. CUNNIFF. JOHN V. CUNNIFF.

\Vitnesses HENRY F. NICKERSON, IRVING U. TowNsnNn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O." 

